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Difficulty: MediumRouting Table Components

Match each Cisco IPv4 routing table entry format on the left with its corresponding operational description on the right.

  • D 192.168.10.0/24 [90/2170112]EIGRP-learned route with an administrative distance of 90 and composite metric of 2170112
  • O 10.1.1.0/24 [110/65]OSPF-learned route with an administrative distance of 110 and cost metric of 65
  • C 172.16.1.0/24Directly connected route with an administrative distance of 0
  • S 0.0.0.0/0 [1/0] via 192.168.1.1Static default route specifying a next-hop IP address of 192.168.1.1

Answer

D 192.168.10.0/24 [90/2170112] matches the EIGRP-learned route description; O 10.1.1.0/24 [110/65] matches the OSPF-learned route description; C 172.16.1.0/24 matches the directly connected route description; S 0.0.0.0/0 [1/0] via 192.168.1.1 matches the static default route description.
Each routing table notation correctly matches its protocol source code ('D' for EIGRP, 'O' for OSPF, 'C' for connected, 'S' for static) and accurately decodes the bracketed administrative distance and metric values.

Step-by-Step Solution

1
Identify routing protocol source codes
Map 'D' to EIGRP, 'O' to OSPF, 'C' to Directly Connected, and 'S' to Static.
Cisco IOS routing tables use standard single-letter source codes to indicate route origins.
2
Interpret bracket notation [AD/Metric]
Extract administrative distance as the first value and route metric as the second value inside the brackets.
The bracketed syntax standardizes administrative distance (route trustworthiness) and metric (path cost).
3
Pair routing lines to functional descriptions
Match each left routing entry string with its corresponding description on the right.
Ensures all routing table components are correctly identified and defined.

Key Concept

Cisco IPv4 Routing Table Component Interpretation
Estimated Time:1m 30s
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Topics

Routing Table Components

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